[{"name":"SP-210098","title":"Presentation of 23.757: 'Study on architectural enhancements for 5G multicast-broadcast services' for approval","source":"SA WG2","contact":"Maurice Pope","contact-id":648,"tdoctype":"draft TR","for":"Approval","abstract":"Abstract of document: TR 23.757 contains the output of the FS_5MBS study (SID in SP-200690 that is revision of SP-200092). This Technical Report studies and evaluates architectural enhancements to the 5G System to address the following objective. Objective: A: Enabling general MBS services over 5GS. Support general multicast and broadcast communication services, e.g., transparent IPv4\/IPv6 multicast delivery, IPTV, software delivery over wireless, group communications and IoT applications, V2X applications, public safety. The TR contains the following key issues and the related solutions. Key Issue #1: MBS session management Key Issue #2: Definition of Service Levels Key Issue #3: Levels of authorization for Multicast communication services Key Issue #4: QoS level support for Multicast and Broadcast communication services Key Issue #6: Local MBS service Key Issue #7: Reliable delivery method switching between unicast and multicast Key Issue #9: Minimizing the interruption of public safety services upon transition between NR\/5GC and E-UTRAN\/EPC Changes since last presentation to TSG SA: This is the third presentation to TSG SA. The TR includes new and updated solutions for all the above Key Issues. The TR includes the evaluations and conclusions for all the above Key Issues. The TR is 100% complete with the following items not handled in Rel-17: - Support of deployments topologies with specific SMF Service Areas - Roaming Outstanding Issues: The disagreement between S2-2100343r02 and S2-2101017 on how to address the signalling efficiency issue for group paging will be resolved in the normative phase in coordination with RAN groups. Contentious Issues: There is disagreement about the implication of removing Support of deployments topologies with specific SMF Service Areas.","secretary_remarks":"Block Approved","agenda_item_sort_order":45,"ainumber":"6.1","ainame":"Specifications for Approval \/ for Information and Approval","tdoc_agenda_sort_order":11310,"status":"approved","reservation_date":"2021-03-11 13:03:13","uploaded":"2021-03-16 14:41:09","revisionof":"","revisedto":"","release":"Rel-17","crspec":"23.757","crspecversion":"2.0.0","workitem":[{"winame":"FS_5MBS"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/TSG_SA\/TSGs_91E_Electronic\/Docs\/SP-210098.zip","group":"SP","meeting":"SP-91-e","year":2021,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]